Comparing trophic levels estimated from a tropical marine food web using an ecosystem model and stable isotopes

Du, Jianguo; Makatipu, Petrus Christianus; Tao, Lily; Pauly, Daniel; Cheung, William W. L.; Peristiwady, Teguh; Liao, Jianji; Chen, Bin

doi:10.1016/j.ecss.2019.106518

Cited by 21 publications

(6 citation statements)

References 56 publications

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“…δ 13 C and δ 15 N were analyzed using the current most efficient procedures, including SIBER metrics (Stable Isotope Bayesian Ellipses in R version 3.6.1), SIAR package (Stable Isotope Analysis in R), and the TL model (Du et al., 2020 ; Post, 2002 ). SPSS Statistics Subscription (IBM Inc.) was also used to determine how similar isotopic signatures were and to distinguish the sources of identical stable isotope characteristics.…”

Section: Methodsmentioning

confidence: 99%

Natural distinction of carbon and nitrogen isotopic niches in common fish species across marine biotopes in the Yellow River estuary

Qü

Pang

et al. 2021

Ecology and Evolution

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Estuarine biotopes display distinct trophic structures of biocoenosis driven by the supply and transformation of multiple energy sources (Underwood, 2010), while flowing waters sustain riverine and marine biodiversity, and make important contributions to global biogeochemical cycles (Palmer & Ruhi, 2019). It has been widely recognized that most adjacent marine ecosystems are strongly connected due to the water transference of organic matter and

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Section: Methodsmentioning

confidence: 99%

Natural distinction of carbon and nitrogen isotopic niches in common fish species across marine biotopes in the Yellow River estuary

Qü

Pang

et al. 2021

Ecology and Evolution

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“…Twenty-three functional groups were defined according to the ecology, taxonomy, feeding or phylogeny characteristics of organisms in the coral reef ecosystem in Xisha Islands, the latest literature in the same area (Hong et al, 2021), and the fish resource survey conducted in Xisha Islands (Sun et al, 2005;Wang et al, 2011), ranging from primary producers to herbivorous fish and Sharks, which basically covered the energy flow process of each trophic level of the ecosystem. The biomass of fish and benthos functional groups were estimated using diving data from Underwater Visual Census (UVC) conducted in 2009, whereas the biomass of other functional groups was got from studies in the SCS (Huang et al, 2009;Hong et al, 2021) and other coral reef model (Du et al, 2020). The P/B, Q/B and EE values of each functional group were mainly acquired from the Qilianyu coral reef model, which lies in the same region (Hong et al, 2021).…”

Section: Model Parameterizationmentioning

confidence: 99%

“…To solve the variability in functional groups and reduce uncertainty, each species is classified into functional groups based on traits, such as individual size, diet, and habitat (Milessi et al, 2010). EwE is advised to divide species into multi-stanza groups (sub-groups), making their dynamics more realistic and providing insights into stockrecruitment relationships, especially the top predators (Christensen et al, 2008;Du et al, 2020). However, we did not define the groups representing life stages or stanzas for species with complex trophic ontogeny in this study owing to a lack of data, which may be uncertain in this model.…”

Section: Parametermentioning

confidence: 99%

Effects of ocean warming and fishing on the coral reef ecosystem: A case study of Xisha Islands, South China Sea

Zhang

et al. 2022

Front. Mar. Sci.

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Global change has generated challenges for oceans, from individuals to the entire ecosystem, and has raised contemporary issues related to ocean conservation and management. Specifically, coral reef ecosystems have been exposed to various environmental and human disturbances. In this study, the Ecopath with Ecosim model was used to explore the impacts of ocean warming and fishing on Xisha Islands coral reef ecosystem in the South China Sea. The variables in this model included two ocean warming scenarios and three fishing scenarios. The model consisted of 23 functional groups including algae, coral, sea birds, and sharks. Our results showed that by the middle of the century, ocean warming and fishing led to a 3.79% and 4.74% decrease in total catch compared with 2009, respectively. In addition, the combined effects of ocean warming and fishing caused a 4.79% decrease in total catch, and the mean trophic level of catch was predicted to decrease by 6.01% under the SSP585-High fishing scenario. Reducing the fishing effort mitigates the effects of ocean warming on some species, such as large carnivorous fish and medium carnivorous fish; however, under low fishing effort, some functional groups, such as small carnivorous and omnivorous fish, have low biomass because of higher predation mortality.

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“…where TL base represents the trophic level of the primary consumer; its value was set as 2 (Du et al, 2020). The nitrogen stable isotope values of the consumer and copepod baseline are represented by d 15 N consumer and d 15 N base , respectively.…”

Section: Trophic Level Calculationmentioning

confidence: 99%

Trophic structure of micronekton in the Northwest Pacific Ocean

Zhang

Liu

et al. 2022

Front. Mar. Sci.

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IntroductionStable isotope analysis has been widely used in the study of the trophic structure of marine micronekton in recent years.MethodsIn this study, the carbon and nitrogen stable isotope values of fish, cephalopod, shrimp and zooplankton species were measured from samples collected in the Northwest Pacific Ocean in March and September 2019 to construct a continuous trophic spectrum and to compare isotope niches among species. In addition, we compared the variation of isotopic niches of micronekton among different groups and among different species, respectively.ResultsSignificant differences of δ13C and δ15N values were detected among fish, cephalopod and shrimp groups with δ13C value ranges of −21.9‰ to −18.7‰, −21.3‰ to −17.7‰ and −20.4‰ to −19.5‰, respectively and the range of δ15N values was 7.0‰ to 12.4‰, 8.2‰ to 12.2‰ and 7.6‰ to 10.6‰, respectively. Using copepods as the baseline for estimating the average trophic level (TL) of micronekton, the TLs ranged from 2.67 to 4.80 and the average TLs for cephalopods, fishes and shrimp were 3.3 ± 0.3, 3.7 ± 0.6 and 4.0 ± 0.3, respectively. Myctophidae and Stomiidae occupied higher TLs. In addition, Oplophorus gracilirostris, Enoploteuthis chunii and Abralia similis had wide isotopic niches.DiscussionOur results show that Myctophidae, Stomiidae, Oplophorus gracilirostris, Enoploteuthis chunii and Abralia similis play important roles in maintaining the stability of the Kuroshio-Oyashio ecosystem in the Northwest Pacific Ocean.

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Comparing trophic levels estimated from a tropical marine food web using an ecosystem model and stable isotopes

Cited by 21 publications

References 56 publications

Natural distinction of carbon and nitrogen isotopic niches in common fish species across marine biotopes in the Yellow River estuary

Natural distinction of carbon and nitrogen isotopic niches in common fish species across marine biotopes in the Yellow River estuary

Effects of ocean warming and fishing on the coral reef ecosystem: A case study of Xisha Islands, South China Sea

Trophic structure of micronekton in the Northwest Pacific Ocean

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